36 lines
1.4 KiB
C#
36 lines
1.4 KiB
C#
using System;
|
|
using System.Text;
|
|
|
|
namespace Birdmap.Common
|
|
{
|
|
public static class PasswordHelper
|
|
{
|
|
public static void CreatePasswordHash(string password, out byte[] passwordHash, out byte[] passwordSalt)
|
|
{
|
|
if (string.IsNullOrWhiteSpace(password)) throw new ArgumentException("Value cannot be null or empty.", "password");
|
|
|
|
using var hmac = new System.Security.Cryptography.HMACSHA512();
|
|
|
|
passwordSalt = hmac.Key;
|
|
passwordHash = hmac.ComputeHash(Encoding.UTF8.GetBytes(password));
|
|
}
|
|
|
|
public static bool VerifyPasswordHash(string password, byte[] storedHash, byte[] storedSalt)
|
|
{
|
|
if (string.IsNullOrWhiteSpace(password)) throw new ArgumentException("Value cannot be null or empty.", nameof(password));
|
|
if (storedHash.Length != 64) throw new ArgumentException("Invalid length of password hash (64 bytes expected).", nameof(storedHash));
|
|
if (storedSalt.Length != 128) throw new ArgumentException("Invalid length of password salt (128 bytes expected).", nameof(storedSalt));
|
|
|
|
using var hmac = new System.Security.Cryptography.HMACSHA512(storedSalt);
|
|
|
|
var computedHash = hmac.ComputeHash(Encoding.UTF8.GetBytes(password));
|
|
for (int i = 0; i < computedHash.Length; i++)
|
|
{
|
|
if (computedHash[i] != storedHash[i]) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|